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Show 1873.] OF THE SUMATRAN RHINOCEROS. 93 with most of the others referred to is more difficult, as they are nearly all immature. The skeleton mounted at the College of Surgeons, No. 2933, obtained by Sir S. Raffles from Sumatra, is aged also; but there are points in which it differs materially from the present specimen. It is of slighter build, and the nasal bones are narrower. A much larger skull, not quite adult, in the Museum of the College of Surgeons, N o . 2935, stated to be that of a " male Sumatran Rhinoceros," and presented by Sir S. Raffles, is evidently from a larger animal, and agrees also with Ceratorhinus lasiotis in being proportionally broader in the parietal regions. In this skull also the posterior of the submental foramina is situated in front of the second premolar; while in all the others (except No. 2936, R.C.S., which is young, but peculiarly massive) it is situated, when present, behind that tooth. Subjoined is a table giving a few of the measurements in the skulls above referred to :- Length of skull from tip of nasals to middle of occipi- Breadth across nasal bones Length of 2nd upper molar Length of 1st upper molar Length of 4 th upper pre- No. 2935, R.C. S. in. 23 5-25 2 1*75 1-6 Zool. Soc. specimen. in. 21-875 6-375 1-775 1-5 1-25 No. 1461A-, B. Mus. in. 21*925 1-7 1-375 1-255 No. 2933, R. C. 8. in. 21-25 4-75 1-6 1-35 1-225 Cambridge specimen. in. 22-125 6-75 The following is an account of the various features of the viscera that were observed in the Sumatran Rhinoceros. Alimentary Canal.-The palate, which is covered with a smooth epithelium, is marked by conspicuous transverse angular ridges. There are eleven of these on each side; and they are not continuous anteriorly across the middle line, but the prominences of one side are carried on as the fossae on the other. The posterior ridges are continuous from one side to the other; and they, instead of being transverse as are those in front, are arranged in the form of a V, the concavity of the V being directed forwards. On the soft palate, which is 4f inches long, these ridges disappear. The palate is narrow, as can be readily seen by an inspection of the skull; anteriorly its breadth is 2f inches, and posteriorly 3{ inches, gradually increasing from before backwards. In no part of the alimentary canal, except on the surface of the tongue, were there any papillae visible to the naked eye. The cheeks form pads on either side composed of areolar and muscular tissue, which project into the cavity of the mouth. These |